Pencil-sharpener.



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UNITED sTATEs PATENT oEEioE.

JOHN W. COVER, OF TAGOMA, WASHING-TON.

PENCIL-SHARPENER.

No. 841,631.l

Specification of Letters Patent..

Patented Jan. 15, 1907.

Application liled July 8,1904. Serial No. 215,711.

. device for this purpose which while being simple and reliable in its operation shall more effectively and satisfactorily do the Work than other devices for the same purpose.

The scope of my invention will be pointed out in the claims terminating this specification.

The drawings illustrate my invention emi bodied in a form which is now preferred by y me.

Figure 1 is a front elevation of my device, showing a pencil in place. Fig. 2 is a sectional elevation taken mainly upon the central line of Fig. l. Fig. 3 is a horizontal section taken through the axis of the cutting or abrading disk. Fig. 4 is an elevation of the sleeve for supporting the pencil-holder. Fig.

5 is a side elevation of the arm which carries the pencil-holder and the mechanism by which it is turned.

In carrying out my invention I provide a base upon which is journaled a cutting or abrading disk, and in which base or in the arm ysupported by said base is journaled a pencil-holder and mechanism for turning said hollder from or in correspondence with said dis The base 1 in the form preferred by me and herein illustrated is of a trough-like shape and is provided with a bearing 10, in which is journaled a shaft 20, carrying upon one end a handle ,or crank 2l and upon the other end a disk 2, which bears eitherdirectly or indirectly an abrading-surface, the same in the form herewith illustrated consisting of an annulus 9, constituting the cutting memberV and secured to theface of the disk 2. These y two parts may be made integral or separate, as may be found best. I have shown the duce a point thereon.

disk as having a recess 23 about its axis, this 4 being designed to accommodate `the pencil' holding and turning apparatus.

The cutting or abrading surface, as shown,

comprising the annulus 9, turns within the trough of the base. This cutting or abrading surface may be made of any suitable material' or construction adapted to satisfactorily cut and abrade the pencil in such way as to pro- This annulus is shown as a thin sheet of steel having a series of cutting edges or teeth 90 formed upon or projecting beyond its face. These teeth may be made after the manner of the teeth of a le or A in any other convenient or suitable manner, as by cutting, casting, orpunching them up. I prefer that these teeth'have an outline in general resembling a spiral,`similar to that A shown in Fig. 1, whereby in rotating' against the surface of the pencil the action is more of a shaving or drawing character than would be the case if the direction ofthe teeth were radial. It is, however, not essential that these teeth have a true spiral outline, although I.prefer that they approximate to the spiral when possible. They may, however, be straight; but in this case I prefer that they extend across the annulus in a direction to make a considerable angle with the radius, whereby the draw-cutting action described may be obtained in a considerable degree.

An arm 3 .extends upward from the base l and is provided with a sleeve or journal 30, within which is mounted a shaft 4, extending substantially parallel with the face of the cutting disk. cured upon its upper end so as to turn'therewith, but preferably to have at least a slight motion lengthwise of the shaft. This friction-disk 40 engages the cutting-disk 2i, preferably by extending over its edge so as to engage the periphery thereof or the periphery of a band 22, extending about the same and consisting of any suitable friction material# such, for instance, as leather or rubber. The friction-disk 40 is held in engagement with the cutting-disk by means of a spring 42, lying between said disk and a head 43 on said shaft. Shaft 4 at its lower end carries a bevel-gear Ail secured thereto.

This shaft has a disk 40 se-I Rotation of the friction-disk with its shaft and the ability to move lengthwise on its shaft may be securedin any convenient manner. I have shownfor this purpose a slot 44 in the disk-hub and a pin of the shaft and in this slot.

I provide a pencil-holder of such character that it may rotate and adapted to hold a pencil extending across the face of the cuttingdisk and adjacent thereto and so mounted that the end of the pencil may be made to engage said disk. The form of pencil-holder which I prefer is shown in section in Fig. 3 and in elevation in Fig. 4. This consists of a sleeve 5, which is stationary, except that it may swing upon a pivot-pin 50, which enters a socket member 31, carried by the arm 3 whereby the sleeve may be turned in a horizontal plane. Within this sleeve is a rotative sleeve 6, which carries the spring-iingers 61, said sleeve and lingers constituting the pencil-holder proper. Upon one end of the sleeve 6 is secured a bevel-gear 60, by which the pencil-holder is turned through engagement with the bevel-gear 41.

I prefer that. this pencil-holder be made adjustable toward and from the base of the cutting-disk, 'so that the angle at which the pencil is sharpened may be varied. To secure this result, I mount the pencil-holder and the mechanism for turning it upon the arm 3 and secure this arm to t-he base in such manner that it may be adjusted bodily toward and from the cutting-disk. As herein shown, this is securedby mounting the base of the arm in a guide 1l., forming a part of the base, and securing it in various positions by means of a screw 32 passing through a slot 12 in arm 11.

The pencil-holder sleeve 5 is provided with a pin 51, located to one side of its central pivot, and this is engaged by means of a spring 52, which is supported from the base so as to tend to swing the point of the pencil toward the cutting-disk. To limit the swing of the pencil in this direction, I provide a stop, the same, as herein shown, consisting of a screw 33, carried by the arm 3 andv `adapted to engage the sleeve 5.

I may, if desired, form an opening in one side of the base, within which may be inserted a little drawer 8, provided with a handle 80, which will act as the receptacle for the shavings and dust produced by the sharpening operation. This may be readily withdrawn and emptied when desired.

In using my device the pencil is simply pushed into the .holder until its point is in the right position. The cutting-disk is then turned, which through the mechanism described also rotates the pencil. The pencil is yieldingly held against the face of the cuttingdisk by means of the spring 52, and by reason of the peculiar character of the cutting-face of the disk and also by reason of the fact that the rotation of the contacting surfaces of disk and pencil are opposite the pencil will danger of breaking the lead. The preferred adjustment of the device is one in which the lead extends beyond the edge of the disk, as is shown in the drawings, the stop 33 being so adjusted as to prevent the pencil from swinging nearer to the disk than just sufficient to remove the wood down to the lead. The lead may be pointed, if this is desired, by pressing some abrading material against the sar.e-as, for instance, a piece of sandpaper, emery-cloth, or any other convenient material-while the pencil is turned.

It is evident that the construction of my device may be widely varied from that herein shown without, however, departing from the principles disclosed. I therefore do not wish to be limited to the exact construction herein shown, but desire to claim all forms which may be properly included in the terms of the claims.

What I claim, and desire to secure by Letters Patent, is-

l. A pencil-Sharpener comprising a rotatable cutting or abrading disk, a pencil-holding device mounted to swing upon an axis substantially radial to the axis of the disk, a spring acting thereon to press the pencil against the disk with its point extending outward from the disk center, and means for automatically turning the pencil on its axis.

2. A pencil-Sharpener comprising a rotatable cutting or abrading disk, a pencil-holding device mounted to swing upon an axis substantially radial to the axis of the disk, a shaft mounted to turn coincident with said radial axis, a friction-disk upon said shaft engaging by its face with the periphery of the cutting-disk, and means for turning the pencil-holding device from said radial shaft.

3. A pencil-Sharpener comprising a rotatable cutting or abrading disk, a pencil-holding clamp mounted to swing upon an axis substantially radial to the axis of the disk, a shaft mounted to turn coincident with the center of said axis, a friction-disk on said shaft engaging by its face with the peripher of the cutting-disk, a spring yieldingly hol ing the said two disks in contact and means for turning the pencil-clamp from said radial shaft.

4. A pencil-Sharpener com rising a rotatable cutting or abrading disk, a pencilclamp mounted to swing upon an axis substantially radial to the axis of the said disk, a spring acting upon said clamp to press the pencil-point against the disk, a shaft mounted to turn coincident with said radial axis, a friction-disk on said shaft engaging by its face with the periphery of the cutting-disk and bevel-gears connecting said shaft and the pencil-clamp.

5. A pencil-Sharpener comprising a rotatable cutting or abrading disk, a standard mounted to be adjusted toward and from the IOO be rapidly sharpened, and also without any l cutting-face of said disk, a shaft journaled in rg0 disk Carried by said shaft and engaging the periphery of the cutting-disk, a pencil-holder rotatably mounted on said standard, and bevel-gears connecting said pencil-holder and shaft.

7. A pencil-Sharpener comprising a rotatable cutting or abrading disk, a standard mounted to be adjusted toward and from the cutting-face of said disk7 a shaft j ournaled in said standard and extending substantially radial With the axis of said disky a `frictiondisk carried by said shaft and engaging the cutting disk, a pencil holder rotatably mounted on said standard, a spring acting on the pencil-holder to press the pencil-point against the cutting-disk and bevel-gears oonneeting said pencil-holder and saidshaft.

In testimony whereof I have hereunto af- 1904, in the presence of tWo Witnesses.

-JOHN W. COVER.

Witnesses CHAs. LARsoN, MATT AYERs.

iiXed my signature, this 24th day of May,` 

